How many Major League Baseball teams were there in 1969?

There were 24 teams in MLB in 1970: NL East - Pittsburgh Pirates, Chicago Cubs, New York Mets, St Louis Cardinals, Philadelphia Phillies, Montreal Expos NL West - Cincinnati Reds, Los Angeles Dodgers, San Francisco Giants, Houston Astros, Atlanta Braves, San Diego Padres AL East - Baltimore Orioles, New York Yankees, Boston Red Sox, Detroit Tigers, Cleveland Indians, Washington Senators AL West - Minnesota Twins, Oakland Athletics, California Angels, Kansas City Royals, Milwaukee Brewers, Chicago White Sox